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Statistics

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A study in a particular state found that only 5% of the voters have Doctoral degrees.  In a random sample of 200 voters, let x be the number who have doctoral degrees.

6)  Find the mean of x.

7)  Find the standard deviation of x.

8)  Find the z-score for x > 10.5

9)  What is the probability that more than 10.5 voters in a sample of 200 voters will hold a Doctoral degree?

10)  What is the probability that at least 10.5 voters in a sample of 200 voters will hold a Doctoral degree?

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